Why should they wait 10 minutes ? I've already ordered several services that get paid before the first confirmation.
Anyway it will be really great ... the only problem I see here is that buses and trains are regulated by governments so that will never happen
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
If the machine accepts it and the fee is pretty low so in most cases it will be approved within 2 mins. Dont have to be on the bus, that will be chaos .